I think it's a good sign that he is willing to look at houses with you, and have this kind of serious future talk.
My only concern looking at your post is that you need to make a lot of very serious changes (according to what you've discussed with your H). It sounds as though you are giving everything else up. Do you want to sever the ties with your family, do you want to quit your job, and are you actually contemplating quitting grad school because you want to?
At this point do you feel like there is any give from your H in terms of things that you want and need? I know that in the DB process we need to allow the WAH to share his feelings, and keep our own under wraps for awhile, but given the amount of life changes that you are expected to make, I hope that you feel there is something in it for you besides just saving the M (which obviously is very important).
Would your H consider going to a therapist WITH you? Just seems like since some of his doubt is still around the stress of the family and how it might impact you, it might be a good route to go.
Anyway it seems pretty positive, as long as you are both comfortable with the direction things are going.
All the best to you!
ITH
Me:34 H:36 M:5 years T: 8 years Bomb: 07/17/08 I want to be separated for 6 months--I don't know what I want the outcome to be S 07/28/08-11/08/08 Living together ~7 months D Possibly busted?!?!!!